AEPA
United States
Environmental Protection
Agency
National Priorities List (NPL)
* * *Proposed Site * * *
WEST COUNTY ROAD 112 GROUND
WATER
® Site Location:
OSWER/OSRTI
Washington, DC 20460
October 2010
Midland, Texas
Midland County
The West County Road 112 Ground Water site is a ground water plume of chromium/hexavalent chromium located in a
rural area of Midland County, Texas immediately to the southwest of the city limits of Midland. The center of the site is
designated as 2601 West County Road 112, Midland, Texas. The site plume currently extends 1 Vi miles from the center of
the site and is situated under approximately 260 acres.
¦a. Site History:	
The site was identified in April 2009 by a local resident who asked the Texas Commission on Environmental Quality
(TCEQ) to test his private well due to yellow discoloration. Sampling of this well revealed the presence of 5,280 ppb of
hexavalent chromium. To date, approximately 234 water wells have been sampled by the TCEQ and 46 water wells have
concentrations of total chromium above the Maximum Contaminant Levels (MCLs) of 100 ppb. TCEQ has installed water
filtration systems at homes where total chromium has been detected above the MCLs.
I Site Contamination/Contaminants:
An Expanded Site Investigation was conducted in February 2010, and no sources were identified. The site is being
evaluated as a ground water plume of chromium/hexavalent chromium with no identified source. Concentrations of
chromium in the wells are as high as 5,280 ppb.
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